Which retail innovation revolutionized wildlife conservation marketing by allowing consumers to 'adopt' endangered animals through symbolic purchases?

The wildlife conservation industry has seen some groundbreaking marketing campaigns that changed how we engage with animal protection efforts. These campaigns not only raised awareness but revolutionized fundraising and public engagement with conservation causes. Test your knowledge about one of the most influential marketing innovations that transformed how conservation organizations connect with supporters.

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WWF's Symbolic Species Adoption Program (1973)
National Geographic's Wildlife Photo Subscription Service (1981)
The Nature Conservancy's Acre Preservation Certificates (1965)
Greenpeace's Ocean Guardian Sponsorship Program (1979)